<template>
    <view class="cart-container" v-if="cart.length !==0">
        <!-- 收货地址组件 -->
        <my-address></my-address>
        <!-- 购物车商品列表的标题区域 -->
        <view class="cart-title">
            <!-- 左侧的图标 -->
            <uni-icons type="shop" size="18"></uni-icons>
            <!-- 描述文本 -->
            <text class="cart-title-text">购物车</text>
        </view>
        <!-- 商品列表区域 -->
        <!-- uni-swipe-action 是最外层包裹性质的容器 -->
        <uni-swipe-action>
            <block v-for="(goods,i) in cart" :key="i">
                <!-- uni-swipe-action-item 可以为其子节点提供滑动的效果，需要通过options属性来指定操作按钮的配置信息 -->
                <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
                    <my-goods :goods='goods' :show-radio="true" @radio-change="radioChangeHandler" :show-num="true" @num-change="numberChangeHandler" ></my-goods>   
                </uni-swipe-action-item>
            </block>
        </uni-swipe-action>

        <!--  自定义结算组件 -->
        <my-settle></my-settle>
    </view>
    <!-- 空白购物车区域 -->
    <view class="empty-cart" v-else>
        <image src="/static/cart_empty@2x.png" class="empty-img"></image>
        <text class="tip-text">空空如也~</text>
    </view>
</template>

<script>
    import badgeMix from '@/mixins/tabbar-badge.js'
    import {mapState} from 'vuex'
    import {mapMutations} from 'vuex'
    export default {
        mixins:[badgeMix],
        computed:{
            // 将m_cart模块中的cart数组映射到当前页面中使用
            ...mapState('m_cart',['cart'])
        },
        data() {
            return {
                options:[{
                    text:'删除',// 显示的文本内容
                    style: {
                        backgroundColor:'#c00000'// 按钮的背景颜色
                    }
                }]
            };
        },
        methods:{
            ...mapMutations('m_cart',['updateGoodsState','updateGoodsCount','removeGoodsById']),
            radioChangeHandler(e){
                // console.log(e);
                this.updateGoodsState(e)
            },
            // 商品的数量发生了变化
            numberChangeHandler(e){
                this.updateGoodsCount(e)
            },
            swipeActionClickHandler(goods){
                this.removeGoodsById(goods.goods_id)
            }
        
        }
    }
</script>

<style lang="scss">
.cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;
    .cart-title-text {
        margin-left: 10px;
    }
}
.cart-container {
    padding-bottom: 50px;
}
.empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;
    .empty-img {
        width: 90px;
        height: 90px;
    }
    .tip-text {
        font-size: 12px;
        color: gray;
        margin-top: 15px;
    }
}
</style>
